/* ============================================================================
   mt_corporate 企业官网主题 — 全站样式
   科技蓝渐变（primary #2563eb → accent #22d3ee，深色区 #0b1220）
   原生 CSS，无构建步骤、无外部依赖；严格按 design-spec.md 实现。
   ---------------------------------------------------------------------------
   目录：
   0) 设计令牌  1) 重置与基础  2) 布局工具  3) 按钮  4) 导航
   5) 页面头/面包屑  6) 区块与标题  7) 首屏  8) 数据条  9) 服务矩阵
   10) 流程步骤  11) 案例/logo 墙  12) 优势  13) FAQ  14) 资讯卡
   15) 转化区  16) 页脚  17) 悬浮/回顶  18) 表单  19) 侧栏/分页/标签
   20) 富文本/GEO  21) 列表/详情/搜索/404  22) 动效  23) 响应式
   ========================================================================== */

/* ---------- 0) 设计令牌 ---------- */
:root {
    /* 颜色（可由后台覆盖，见 base.html 注入） */
    --c-primary: #2563eb;
    --c-primary-dark: #1d4db7;                 /* color-mix 可用时由 base 覆盖 */
    --c-primary-soft: #e5ecfd;                 /* color-mix 可用时由 base 覆盖 */
    --c-accent: #22d3ee;
    --c-dark: #0b1220;
    --bg: #ffffff;
    --bg-soft: #f8fafc;
    --t-1: #0f172a;
    --t-2: #334155;
    --t-3: #64748b;
    --t-4: #94a3b8;
    --line: #e2e8f0;

    --ok: #16a34a;
    --ok-text: #15803d;
    --ok-soft: #dcfce7;
    --warn-text: #b45309;
    --warn-soft: #fef3c7;
    --danger: #dc2626;
    --danger-text: #b91c1c;
    --danger-soft: #fee2e2;

    --dark-t1: #e2e8f0;
    --dark-t2: #94a3b8;
    --dark-line: #1e293b;
    --dark-link: #93b4ff;

    /* 渐变 */
    --grad-angle: 135deg;
    --grad-brand: linear-gradient(var(--grad-angle), var(--c-primary) 0%, var(--c-accent) 100%);

    /* 形状 / 阴影 */
    --radius: 14px;
    --radius-sm: calc(var(--radius) * 0.64);
    --radius-lg: calc(var(--radius) * 1.28);
    --container: 1200px;
    --shadow: 0 1px 3px rgba(15, 23, 42, .06), 0 8px 24px rgba(15, 23, 42, .06);
    --shadow-lg: 0 24px 64px rgba(2, 6, 23, .35);

    /* 间距 */
    --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px;
    --sp-5: 20px; --sp-6: 24px; --sp-8: 32px; --sp-10: 40px;
    --sp-12: 48px; --sp-16: 64px; --sp-20: 80px; --sp-24: 96px;

    /* 字体 */
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC",
                 "Segoe UI", Roboto, sans-serif;
    --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;

    /* 区块纵向节奏 */
    --sec-pad: var(--sp-24);
}

/* ---------- 1) 重置与基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.75;
    color: var(--t-1);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}
img, svg, video { max-width: 100%; }
img { height: auto; display: block; }
a { color: var(--c-primary); text-decoration: none; }
a:hover { color: var(--c-primary-dark); }
h1, h2, h3, h4, h5, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }
strong { font-weight: 700; }

/* 焦点可见（无障碍 §9.1） */
:focus-visible { outline: 2px solid var(--c-primary); outline-offset: 2px; border-radius: inherit; }
.dark-area :focus-visible, .corp-hero :focus-visible, .corp-cta :focus-visible, .site-footer :focus-visible {
    outline-color: var(--dark-link);
}

/* 跳转链接 */
.skip-link {
    position: absolute; left: -9999px; top: 0; z-index: 1200;
    background: var(--c-primary); color: #fff; padding: 10px 18px;
    border-radius: 0 0 var(--radius-sm) 0; font-size: 14px;
}
.skip-link:focus { left: 0; color: #fff; }

/* 阅读进度条 */
.scroll-progress {
    position: fixed; top: 0; left: 0; height: 3px; width: 0;
    background: var(--grad-brand); z-index: 1100; pointer-events: none;
}

/* ---------- 2) 布局工具 ---------- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--sp-6); }
.layout-narrow { max-width: 760px; margin: 0 auto; }
.layout-single { max-width: 640px; margin: 0 auto; }
.layout-list, .layout-detail {
    display: grid; grid-template-columns: minmax(0, 1fr) 300px;
    gap: 44px; align-items: start;
    padding: var(--sp-12) 0 var(--sp-20);
}
.layout-detail { padding-top: var(--sp-8); }
.list-main { min-width: 0; }

/* 区块 */
.corp-section { padding: var(--sec-pad) 0; position: relative; }
.corp-section.alt { background: var(--bg-soft); }

/* 区块标题 */
.sec-head { max-width: 760px; margin: 0 auto var(--sp-12); text-align: center; }
.sec-head .kicker {
    display: inline-block; font-size: 13.5px; font-weight: 700; letter-spacing: .14em;
    text-transform: uppercase; color: var(--c-primary); margin-bottom: var(--sp-3);
}
.sec-head h2 { font-size: clamp(26px, 3.4vw, 38px); line-height: 1.25; font-weight: 800; letter-spacing: -.012em; color: var(--t-1); }
.sec-head p { margin-top: var(--sp-4); font-size: clamp(16px, 1.6vw, 18px); line-height: 1.8; color: var(--t-3); }
.sec-more { text-align: center; margin-top: var(--sp-12); }

/* 通用箭头链接 */
.link-arrow { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; color: var(--c-primary); font-size: 15px; }
.link-arrow svg { width: 18px; height: 18px; transition: transform .2s ease; }
.link-arrow:hover svg { transform: translateX(3px); }

/* ---------- 3) 按钮 ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 11px 22px; min-height: 44px; border-radius: var(--radius-sm);
    font-size: 15px; font-weight: 600; line-height: 1.2; border: 1px solid transparent;
    transition: background-color .18s ease, color .18s ease, border-color .18s ease, transform .18s ease, box-shadow .18s ease;
    text-align: center;
}
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }
.btn-primary { background: var(--c-primary); color: #fff; box-shadow: 0 6px 18px rgba(37, 99, 235, .3); }
.btn-primary:hover { background: var(--c-primary-dark); color: #fff; transform: translateY(-1px); }
.btn-outline { background: #fff; color: var(--c-primary); border-color: var(--c-primary); }
.btn-outline:hover { background: var(--c-primary-soft); color: var(--c-primary-dark); }
.btn-ghost { background: rgba(255, 255, 255, .1); color: #fff; border-color: rgba(255, 255, 255, .28); }
.btn-ghost:hover { background: rgba(255, 255, 255, .18); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-text); color: #fff; }
.btn-sm { padding: 7px 15px; font-size: 14px; min-height: 36px; }
.btn-lg { padding: 14px 28px; font-size: 16px; min-height: 50px; }
.btn[disabled], .btn:disabled { opacity: .55; cursor: not-allowed; transform: none; box-shadow: none; }

/* ---------- 4) 导航 ---------- */
.navbar {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255, 255, 255, .92);
    -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
    transition: box-shadow .25s ease;
}
.navbar.is-scrolled { box-shadow: 0 8px 28px rgba(15, 23, 42, .09); }
.navbar-inner { display: flex; align-items: center; gap: var(--sp-5); min-height: 64px; }
.logo { display: inline-flex; align-items: center; gap: 10px; color: var(--t-1); flex-shrink: 0; }
.logo:hover { color: var(--t-1); }
.logo-mark {
    width: 30px; height: 30px; border-radius: 8px; background: var(--grad-brand);
    color: #fff; font-weight: 800; font-size: 16px; display: inline-flex;
    align-items: center; justify-content: center; flex-shrink: 0;
}
.logo-text { display: inline-flex; flex-direction: column; line-height: 1.05; }
.logo-text b { font-size: 19px; font-weight: 800; letter-spacing: -.01em; }
.logo-text i { font-style: normal; font-size: 11px; color: var(--t-4); letter-spacing: .04em; }

.nav { display: flex; align-items: center; gap: 2px; flex: 1; min-width: 0; }
.nav-link {
    position: relative; display: inline-flex; align-items: center; gap: 4px;
    padding: 8px 13px; border-radius: 8px; font-size: 14.5px; color: var(--t-2);
    font-weight: 500; white-space: nowrap;
}
.nav-link::after {
    content: ""; position: absolute; left: 13px; right: 13px; bottom: 4px; height: 2px;
    background: var(--c-primary); transform: scaleX(0); transform-origin: left;
    transition: transform .22s ease;
}
.nav-link:hover, .nav-link.is-active, .nav-link.current, .nav-link.current_ancestor { color: var(--c-primary); }
.nav-link:hover::after, .nav-link.is-active::after, .nav-link.current::after { transform: scaleX(1); }
.nav-link .caret { width: 10px; height: 6px; color: var(--t-4); }

.nav-drop { position: relative; display: inline-flex; }
.nav-sub {
    position: absolute; top: 100%; left: 0; min-width: 200px; padding: 6px;
    background: #fff; border: 1px solid var(--line); border-radius: 10px;
    box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translateY(6px);
    transition: opacity .18s ease, transform .18s ease, visibility .18s; z-index: 50;
}
.nav-drop:hover .nav-sub, .nav-drop:focus-within .nav-sub { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-sub a { display: block; padding: 9px 12px; border-radius: 8px; font-size: 14px; color: var(--t-2); }
.nav-sub a:hover { background: var(--bg-soft); color: var(--c-primary); }

.navbar-actions { display: flex; align-items: center; gap: var(--sp-3); margin-left: auto; flex-shrink: 0; }
.nav-icon-btn { width: 40px; height: 40px; border-radius: 9px; display: inline-flex; align-items: center; justify-content: center; color: var(--t-2); }
.nav-icon-btn svg { width: 20px; height: 20px; }
.nav-icon-btn:hover { background: var(--bg-soft); color: var(--c-primary); }

.nav-toggle {
    display: none; width: 44px; height: 44px; border: 1px solid var(--line);
    border-radius: 9px; background: #fff; padding: 0; margin-left: auto;
    flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--t-2); border-radius: 2px; transition: transform .2s ease, opacity .2s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-search { display: none; }

/* ---------- 5) 页面头 / 面包屑 ---------- */
.page-hero { padding: 46px 0 40px; background: linear-gradient(180deg, var(--bg-soft), #fff); border-bottom: 1px solid var(--line); }
.page-hero h1 { font-size: clamp(24px, 3.4vw, 34px); line-height: 1.3; font-weight: 800; letter-spacing: -.015em; }
.page-hero .desc { margin-top: var(--sp-4); max-width: 700px; color: var(--t-3); font-size: 16px; }
.page-hero .count { margin-top: var(--sp-3); color: var(--t-4); font-size: 13.5px; }

.crumb { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: 13.5px; color: var(--t-4); padding: 0 0 var(--sp-5); }
.crumb a { color: var(--t-3); }
.crumb a:hover { color: var(--c-primary); }
.crumb [aria-current="page"] { color: var(--t-2); }

/* ---------- 6) 服务矩阵 ---------- */
.svc-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--sp-6); counter-reset: svc; }
.svc-card {
    position: relative; display: flex; flex-direction: column;
    padding: 26px 24px; background: #fff; border: 1px solid var(--line);
    border-radius: var(--radius); color: var(--t-1); overflow: hidden;
    transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}
.svc-card::before {
    content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: var(--grad-brand); transform: scaleX(0); transform-origin: left;
    transition: transform .35s ease;
}
.svc-card:hover { border-color: #bfdbfe; box-shadow: var(--shadow); transform: translateY(-3px); color: var(--t-1); }
.svc-card:hover::before { transform: scaleX(1); }
.svc-no {
    position: absolute; right: 14px; bottom: 2px; font-size: 68px; font-weight: 800;
    line-height: 1; color: var(--c-primary-soft); z-index: 0; pointer-events: none;
}
.svc-no::before { counter-increment: svc; content: counter(svc, decimal-leading-zero); }
.svc-icon {
    position: relative; z-index: 1; width: 48px; height: 48px; border-radius: 12px;
    background: var(--c-primary-soft); color: var(--c-primary-dark);
    display: inline-flex; align-items: center; justify-content: center; font-size: 24px;
    transition: transform .3s cubic-bezier(.34, 1.56, .64, 1);
}
.svc-icon .ico { width: 24px; height: 24px; }
.svc-card:hover .svc-icon { transform: scale(1.12) rotate(-6deg); }
.svc-title { position: relative; z-index: 1; margin-top: var(--sp-5); font-size: clamp(17px, 1.6vw, 20px); font-weight: 700; line-height: 1.45; }
.svc-desc { position: relative; z-index: 1; margin-top: var(--sp-3); color: var(--t-3); font-size: 14.5px; line-height: 1.7; }
.svc-tags { position: relative; z-index: 1; margin-top: var(--sp-4); display: flex; flex-direction: column; gap: 8px; }
.svc-tags li { position: relative; padding-left: 20px; font-size: 13.5px; line-height: 1.6; color: var(--t-3); }
.svc-tags li::before { content: ""; position: absolute; left: 2px; top: 8px; width: 7px; height: 7px; border-radius: 2px; background: var(--grad-brand); }
.svc-card .link-arrow { position: relative; z-index: 1; margin-top: var(--sp-6); }

/* ---------- 7) 首屏 ---------- */
.corp-hero { position: relative; background: var(--c-dark); color: #fff; overflow: hidden; }
.corp-hero[data-has-bg]::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(11, 18, 32, .72), rgba(11, 18, 32, .92)); pointer-events: none; }
.hero-orb { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5; pointer-events: none; }
.corp-hero .orb-a, .corp-cta .orb-a { width: 460px; height: 460px; left: -120px; top: -140px; background: var(--c-primary); animation: fx-orb 16s ease-in-out infinite; }
.corp-hero .orb-b, .corp-cta .orb-b { width: 380px; height: 380px; right: -100px; top: 40px; background: var(--c-accent); opacity: .35; animation: fx-orb 18s ease-in-out infinite reverse; }
.hero-grid {
    position: absolute; inset: 0; pointer-events: none;
    background-image: linear-gradient(rgba(148, 163, 184, .08) 1px, transparent 1px), linear-gradient(90deg, rgba(148, 163, 184, .08) 1px, transparent 1px);
    background-size: 44px 44px;
    -webkit-mask-image: radial-gradient(circle at 30% 30%, #000, transparent 72%);
    mask-image: radial-gradient(circle at 30% 30%, #000, transparent 72%);
}
.hero-inner {
    position: relative; z-index: 2;
    display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: var(--sp-12); align-items: center; padding: var(--sp-24) 0 var(--sp-20);
}
.hero-copy { max-width: 640px; }
.hero-badge {
    display: inline-flex; align-items: center; gap: 8px; padding: 5px 14px; border-radius: 999px;
    font-size: 13.5px; color: #bfdbfe; background: rgba(59, 130, 246, .16);
    border: 1px solid rgba(96, 165, 250, .35);
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: #4ade80; box-shadow: 0 0 0 0 rgba(74, 222, 128, .6); animation: fx-pulse 2.2s ease-out infinite; }
.hero-title { margin-top: var(--sp-6); font-size: clamp(30px, 5.2vw, 56px); line-height: 1.12; font-weight: 800; letter-spacing: -.02em; color: #fff; }
.hero-title em {
    font-style: normal;
    background: linear-gradient(100deg, var(--c-accent), #93b4ff, var(--c-accent));
    background-size: 200% auto; -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: transparent;
    animation: fx-shimmer 5s linear infinite;
}
.hero-sub { margin-top: var(--sp-6); max-width: 560px; font-size: clamp(16px, 1.6vw, 18px); line-height: 1.8; color: var(--dark-t1); }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--sp-4); margin-top: var(--sp-8); }
.hero-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 22px; margin-top: var(--sp-8); color: var(--dark-t2); font-size: 14px; }
.hero-meta span { position: relative; padding-left: 16px; }
.hero-meta span::before { content: ""; position: absolute; left: 0; top: 50%; width: 6px; height: 6px; margin-top: -3px; border-radius: 50%; background: var(--c-accent); }

.hero-visual { position: relative; z-index: 2; }
.browser-mock {
    border-radius: var(--radius); overflow: hidden; background: #0e1628;
    border: 1px solid rgba(148, 163, 184, .22); box-shadow: var(--shadow-lg);
}
.browser-bar { display: flex; align-items: center; gap: 6px; padding: 11px 14px; background: rgba(148, 163, 184, .1); }
.browser-bar i { width: 10px; height: 10px; border-radius: 50%; background: #37455f; }
.browser-bar i:nth-child(1) { background: #f87171; }
.browser-bar i:nth-child(2) { background: #fbbf24; }
.browser-bar i:nth-child(3) { background: #34d399; }
.browser-bar .addr { margin-left: 10px; flex: 1; font-size: 12px; color: var(--dark-t2); }
.browser-mock img, .browser-mock-svg { display: block; width: 100%; height: auto; }
.hero-scroll {
    position: absolute; left: 50%; bottom: 20px; transform: translateX(-50%); z-index: 3;
    display: inline-flex; flex-direction: column; align-items: center; gap: 4px;
    font-size: 12.5px; letter-spacing: .06em; color: var(--dark-t2);
}
.hero-scroll:hover { color: #fff; }
.hero-scroll svg { width: 18px; height: 18px; animation: fx-arrow 1.8s ease-in-out infinite; }

/* ---------- 8) 数据条 ---------- */
.corp-stats { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #fff; }
.stats-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); padding: 26px 0; }
.stat { text-align: center; padding: var(--sp-2) var(--sp-4); }
.stat + .stat { border-left: 1px solid var(--line); }
.stat strong { display: block; font-size: 34px; font-weight: 800; line-height: 1.1; color: var(--c-primary); font-variant-numeric: tabular-nums; letter-spacing: -.01em; }
.stat span { display: block; margin-top: 8px; font-size: 13.5px; color: var(--t-3); }

/* ---------- 9) 流程步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: var(--sp-5); counter-reset: step; }
.step { position: relative; text-align: center; padding: 0 var(--sp-2); }
.step::after {
    content: ""; position: absolute; top: 18px; left: 50%; width: 100%; height: 2px;
    background: linear-gradient(90deg, var(--c-primary), var(--c-accent)); opacity: .28;
}
.step:last-child::after { display: none; }
.step-no {
    position: relative; z-index: 1; display: inline-flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; border-radius: 50%; background: var(--c-primary-soft);
    color: var(--c-primary-dark); font-size: 15px; font-weight: 700;
    transition: background-color .2s ease, color .2s ease;
}
.step-no::before { counter-increment: step; content: counter(step, decimal-leading-zero); }
.step:hover .step-no { background: var(--c-primary); color: #fff; }
.step-title { margin-top: var(--sp-4); font-size: clamp(17px, 1.6vw, 20px); font-weight: 700; }
.step-desc { margin-top: var(--sp-2); font-size: 14px; line-height: 1.7; color: var(--t-3); }

/* ---------- 10) 案例 / logo 墙 ---------- */
.logo-wall { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: var(--sp-6) var(--sp-12); margin-bottom: var(--sp-16); }
.logo-item { display: inline-flex; align-items: center; justify-content: center; filter: grayscale(1) opacity(.6); transition: filter .25s ease; }
.logo-item:hover { filter: grayscale(0) opacity(1); }
.logo-item img { height: 32px; width: auto; }
.logo-item .logo-text { font-size: 17px; font-weight: 700; color: var(--t-3); letter-spacing: .02em; }
.case-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--sp-6); }
.case-card {
    display: flex; flex-direction: column; background: #fff;
    border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; color: var(--t-1);
    transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}
.case-card:hover { border-color: #bfdbfe; box-shadow: var(--shadow); transform: translateY(-3px); color: var(--t-1); }
.case-thumb { aspect-ratio: 4 / 3; overflow: hidden; background: var(--bg-soft); display: flex; align-items: center; justify-content: center; }
.case-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s ease; }
.case-card:hover .case-thumb img { transform: scale(1.04); }
.case-fallback {
    width: 100%; height: 100%; display: flex; align-items: center; justify-content: center;
    font-size: 40px; font-weight: 800; color: #fff; background: var(--grad-brand);
}
.case-body { padding: 20px 22px 24px; }
.case-body .tag { margin-bottom: 10px; }
.case-body h3 { font-size: clamp(17px, 1.6vw, 20px); font-weight: 700; line-height: 1.45; }
.case-body p { margin-top: 8px; font-size: 14px; line-height: 1.7; color: var(--t-3); }

/* ---------- 11) 优势 ---------- */
.why-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sp-6); }
.why-card {
    display: flex; gap: var(--sp-5); padding: 26px 24px; background: #fff;
    border: 1px solid var(--line); border-radius: var(--radius);
    transition: border-color .2s ease;
}
.why-card:hover { border-color: #bfdbfe; }
.why-icon { flex-shrink: 0; width: 48px; height: 48px; color: var(--c-primary); display: inline-flex; align-items: center; justify-content: center; }
.why-icon .ico { width: 34px; height: 34px; }
.why-body h3 { font-size: clamp(17px, 1.6vw, 20px); font-weight: 700; }
.why-body p { margin-top: 8px; font-size: 14.5px; line-height: 1.72; color: var(--t-3); }

/* ---------- 12) FAQ ---------- */
.faq { max-width: 820px; margin: 0 auto; }
.faq details {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm);
    margin-bottom: 12px; overflow: hidden;
}
.faq summary {
    position: relative; padding: 17px 22px; padding-right: 52px;
    font-size: 15.5px; font-weight: 600; color: var(--t-1); cursor: pointer; list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
    content: "+"; position: absolute; right: 20px; top: 50%; transform: translateY(-50%);
    font-size: 20px; color: var(--c-primary); transition: transform .2s ease;
}
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-body { padding: 0 22px 18px; font-size: 14.5px; line-height: 1.8; color: var(--t-3); animation: fx-faq .3s ease; }
.faq-more { margin-top: var(--sp-6); text-align: center; }

/* ---------- 13) 资讯卡 ---------- */
.post-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--sp-6); }
.post-grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.post-card {
    display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line);
    border-radius: var(--radius); overflow: hidden; color: var(--t-1);
    transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}
.post-card:hover { border-color: #bfdbfe; box-shadow: var(--shadow); transform: translateY(-3px); color: var(--t-1); }
.post-thumb { display: block; aspect-ratio: 16 / 9; overflow: hidden; background: var(--bg-soft); }
.post-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s ease; }
.post-card:hover .post-thumb img { transform: scale(1.04); }
.post-fallback { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; font-size: 36px; font-weight: 800; color: #fff; background: var(--grad-brand); }
.post-body { display: flex; flex-direction: column; flex: 1; padding: 20px 22px 22px; }
.post-body h3 { font-size: clamp(17px, 1.6vw, 19px); font-weight: 700; line-height: 1.45; }
.post-body h3 a { color: var(--t-1); }
.post-body h3 a:hover { color: var(--c-primary); }
.post-body .excerpt { margin-top: 10px; font-size: 14px; line-height: 1.7; color: var(--t-3); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.post-meta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: auto; padding-top: var(--sp-4); font-size: 13px; color: var(--t-4); }

/* ---------- 14) 转化区 ---------- */
.corp-cta { position: relative; background: var(--c-dark); color: #fff; overflow: hidden; padding: var(--sec-pad) 0; }
.cta-inner { position: relative; z-index: 2; text-align: center; max-width: 760px; }
.corp-cta h2 { font-size: clamp(26px, 3.4vw, 38px); font-weight: 800; letter-spacing: -.012em; color: #fff; }
.cta-sub { margin-top: var(--sp-4); font-size: clamp(16px, 1.6vw, 18px); line-height: 1.8; color: var(--dark-t2); }
.cta-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--sp-4); margin-top: var(--sp-8); }
.cta-qr { margin-top: var(--sp-8); display: inline-flex; flex-direction: column; align-items: center; gap: 8px; }
.cta-qr img { width: 120px; height: 120px; border-radius: 10px; background: #fff; padding: 6px; }
.cta-qr span { font-size: 13.5px; color: var(--dark-t2); }

/* ---------- 15) 页脚 ---------- */
.site-footer { background: var(--c-dark); color: #64748b; padding: 54px 0 38px; font-size: 14px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: var(--sp-10); }
.logo-light { color: #fff; }
.logo-light:hover { color: #fff; }
.logo-light .logo-mark { background: var(--grad-brand); }
.foot-tagline { margin-top: var(--sp-5); max-width: 300px; font-size: 13.5px; line-height: 1.8; color: #64748b; }
.foot-note { margin-top: 10px; max-width: 300px; font-size: 13px; color: #475569; }
.foot-col h5 { font-size: 14.5px; font-weight: 600; color: var(--dark-t1); margin-bottom: 14px; }
.foot-col a, .foot-contact { display: flex; align-items: center; gap: 8px; padding: 4px 0; font-size: 13.5px; color: var(--dark-t2); }
.foot-col a:hover { color: #fff; }
.foot-contact svg { width: 15px; height: 15px; flex-shrink: 0; }
.foot-text { color: var(--dark-t2); font-size: 13.5px; }
.foot-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--sp-4); margin-top: 38px; padding-top: 20px; border-top: 1px solid var(--dark-line); font-size: 13px; color: #64748b; }
.foot-legal { display: inline-flex; flex-wrap: wrap; gap: 16px; }
.foot-legal a { color: #64748b; }
.foot-legal a:hover { color: #fff; }

/* ---------- 16) 悬浮客服 / 回到顶部 ---------- */
.float-service { position: fixed; right: 20px; bottom: 80px; z-index: 90; display: flex; flex-direction: column; gap: 12px; }
.float-btn {
    width: 48px; height: 48px; border-radius: 50%; background: #fff; border: 1px solid var(--line);
    box-shadow: var(--shadow); display: inline-flex; align-items: center; justify-content: center;
    color: var(--c-primary); padding: 0; transition: background-color .2s ease, color .2s ease, transform .2s ease;
}
.float-btn svg { width: 24px; height: 24px; }
.float-btn:hover { background: var(--c-primary); color: #fff; transform: translateY(-2px); }
.float-qr {
    position: absolute; right: calc(100% + 10px); bottom: 0; width: 184px; padding: 12px;
    background: #fff; border-radius: var(--radius-sm); box-shadow: var(--shadow); text-align: center;
}
.float-qr-title { font-size: 12.5px; color: var(--t-3); margin-bottom: 8px; }
.float-qr img { width: 160px; height: 160px; border-radius: 8px; }
.float-qr-ph { width: 160px; height: 160px; border-radius: 8px; background: var(--grad-brand); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 40px; font-weight: 800; }
.float-qr-id { margin-top: 8px; font-size: 12.5px; color: var(--t-2); }

.to-top {
    position: fixed; right: 24px; bottom: 28px; z-index: 91;
    width: 44px; height: 44px; border-radius: 50%; background: #fff; border: 1px solid var(--line);
    box-shadow: var(--shadow); color: var(--t-2); display: inline-flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden; transform: translateY(8px);
    transition: opacity .25s ease, transform .25s ease, visibility .25s;
}
.to-top svg { width: 20px; height: 20px; }
.to-top.is-show { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { color: var(--c-primary); }

/* ---------- 17) 表单 ---------- */
.form-grid { display: grid; gap: var(--sp-5); }
.form-row { display: block; }
.form-row label { display: block; margin-bottom: 7px; font-size: 14px; font-weight: 600; color: var(--t-1); }
.form-row .req { color: var(--danger); margin-left: 2px; }
.form-row input[type="text"], .form-row input[type="tel"], .form-row input[type="email"],
.form-row input[type="search"], .form-row input[type="number"], .cms-form select, .form-row textarea {
    width: 100%; padding: 11px 14px; min-height: 44px; font-size: 15px; font-family: inherit;
    color: var(--t-1); background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm);
    transition: border-color .18s ease, box-shadow .18s ease;
}
.form-row textarea { min-height: 130px; resize: vertical; line-height: 1.7; }
.form-row input::placeholder, .form-row textarea::placeholder { color: var(--t-4); }
.form-row input:focus, .form-row textarea:focus, .cms-form select:focus { border-color: var(--c-primary); box-shadow: 0 0 0 3px var(--c-primary-soft); outline: none; }
.form-row input[aria-invalid="true"], .form-row textarea[aria-invalid="true"] { border-color: var(--danger); }
.form-tip { margin-top: 10px; font-size: 13px; color: var(--t-4); line-height: 1.6; }
.form-submit { display: flex; flex-direction: column; align-items: flex-start; }
.honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.captcha-box { display: flex; align-items: center; gap: 10px; }
.captcha-box input { flex: 1; }

.alert { padding: 13px 18px; border-radius: 10px; font-size: 14.5px; line-height: 1.7; margin-bottom: var(--sp-5); }
.alert.ok { background: var(--ok-soft); color: var(--ok-text); }
.alert.err { background: var(--danger-soft); color: var(--danger-text); }

.form-card { padding: 30px 28px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }

/* ---------- 18) 侧栏 / 组件 / 分页 / 标签 ---------- */
.sidebar { position: sticky; top: 82px; display: flex; flex-direction: column; gap: var(--sp-6); }
.widget { padding: 22px 22px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.widget h3 { font-size: 16px; font-weight: 700; margin-bottom: 14px; }
.widget-nav { display: flex; flex-direction: column; }
.widget-nav a { padding: 7px 0; font-size: 14px; color: var(--t-2); border-bottom: 1px solid var(--bg-soft); }
.widget-nav a:last-child { border-bottom: 0; }
.widget-nav a:hover, .widget-nav a.is-active { color: var(--c-primary); }
.widget-nav .sub { padding-left: 12px; }
.widget-toc { display: flex; flex-direction: column; gap: 2px; }
.widget-toc a { padding: 6px 12px; font-size: 13.5px; color: var(--t-3); border-left: 2px solid var(--line); }
.widget-toc a.lv3 { padding-left: 24px; }
.widget-toc a.is-active, .widget-toc a:hover { color: var(--c-primary); border-left-color: var(--c-primary); }
.widget-cta p { font-size: 13.5px; color: var(--t-3); margin-bottom: 14px; line-height: 1.7; }
.widget-phone { font-size: 20px; font-weight: 800; margin-bottom: 8px; }
.widget-phone a { color: var(--c-primary); }

.pager { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 8px; margin-top: var(--sp-16); }
.pager a, .pager span { display: inline-flex; align-items: center; justify-content: center; min-width: 38px; height: 38px; padding: 0 12px; font-size: 14px; color: var(--t-2); background: #fff; border: 1px solid var(--line); border-radius: 9px; }
.pager a:hover { color: var(--c-primary); border-color: var(--c-primary); }
.pager .current { background: var(--c-primary); border-color: var(--c-primary); color: #fff; font-weight: 600; }
.pager .disabled { color: var(--t-4); background: var(--bg-soft); }
.pager .pager-of { border: 0; background: none; color: var(--t-4); }

.tag { display: inline-flex; align-items: center; padding: 2px 10px; border-radius: 999px; font-size: 12px; font-weight: 500; background: var(--bg-soft); border: 1px solid var(--line); color: var(--t-3); }
.tag.blue { background: var(--c-primary-soft); color: var(--c-primary-dark); border: 0; }
.tag.green { background: var(--ok-soft); color: var(--ok-text); border: 0; }
.stack-tags { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }

.check-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sp-4) var(--sp-8); }
.check-list li { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; color: var(--t-2); line-height: 1.7; }
.check-ico { flex-shrink: 0; width: 22px; height: 22px; margin-top: 3px; border-radius: 50%; background: var(--ok-soft); color: var(--ok-text); display: inline-flex; align-items: center; justify-content: center; }
.check-ico svg { width: 14px; height: 14px; }

.empty { padding: 60px 20px; text-align: center; color: var(--t-4); font-size: 14.5px; }
.empty strong { display: block; font-size: 17px; color: var(--t-2); margin-bottom: 8px; }

/* ---------- 19) 富文本 / GEO / 详情 ---------- */
.prose { font-size: 16.5px; line-height: 1.9; color: var(--t-2); }
.prose > * + * { margin-top: 1.1em; }
.prose h2 { position: relative; padding-left: 14px; font-size: 24px; font-weight: 800; line-height: 1.4; color: var(--t-1); margin-top: 1.6em; }
.prose h2::before { content: ""; position: absolute; left: 0; top: 4px; bottom: 4px; width: 4px; border-radius: 2px; background: var(--c-primary); }
.prose h3 { font-size: 19px; font-weight: 700; color: var(--t-1); margin-top: 1.4em; }
.prose h4 { font-size: 17px; font-weight: 700; color: var(--t-1); margin-top: 1.2em; }
.prose a { text-decoration: underline; text-underline-offset: 3px; }
.prose img { border-radius: 10px; margin: 1.4em auto; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin: 0.4em 0; }
.prose blockquote { margin: 1.4em 0; padding: 14px 20px; background: var(--bg-soft); border-left: 4px solid var(--c-primary); border-radius: 0 10px 10px 0; color: var(--t-2); }
.prose code { font-family: var(--font-mono); font-size: .92em; background: var(--bg-soft); padding: 2px 6px; border-radius: 5px; }
.prose pre { background: var(--c-dark); color: var(--dark-t1); padding: 18px 20px; border-radius: 10px; overflow-x: auto; font-family: var(--font-mono); font-size: 14px; line-height: 1.7; }
.prose pre code { background: none; padding: 0; color: inherit; }
.prose table { width: 100%; border-collapse: collapse; font-size: 15px; }
.prose th, .prose td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; }
.prose th { background: var(--bg-soft); font-weight: 700; color: var(--t-1); }

.article-main { min-width: 0; }
.article-head { padding-bottom: var(--sp-8); border-bottom: 1px solid var(--line); margin-bottom: var(--sp-8); }
.article-head h1 { font-size: clamp(24px, 3.4vw, 34px); font-weight: 800; line-height: 1.3; letter-spacing: -.015em; }
.article-head .lead { margin-top: var(--sp-4); font-size: 17px; color: var(--t-3); line-height: 1.8; }
.article-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: var(--sp-5); font-size: 13.5px; color: var(--t-4); }
.article-meta .like-btn { background: none; border: 0; padding: 0; font-size: 13.5px; color: var(--c-primary); }
.article-meta .like-btn.is-liked { color: var(--t-4); }

.geo-block { margin: 1.6em 0; padding: 20px 22px; background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius-sm); }
.geo-block h2 { padding-left: 0; font-size: 17px; margin: 0 0 12px; }
.geo-block h2::before { display: none; }
.geo-points li { position: relative; padding-left: 20px; margin: 6px 0; font-size: 15px; color: var(--t-2); }
.geo-points li::before { content: ""; position: absolute; left: 2px; top: 11px; width: 7px; height: 7px; border-radius: 50%; background: var(--c-primary); }
.geo-sources li { margin: 6px 0; font-size: 14px; color: var(--t-3); }
.geo-faq details { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm); margin-bottom: 8px; }
.geo-faq summary { padding: 14px 18px; font-weight: 600; cursor: pointer; list-style: none; }
.geo-faq summary::-webkit-details-marker { display: none; }
.geo-faq .faq-body { padding: 0 18px 16px; color: var(--t-3); font-size: 14.5px; }
.citation { margin-top: var(--sp-8); font-size: 13px; color: var(--t-4); word-break: break-all; }
.ai-disclosure { margin-top: var(--sp-5); padding: 10px 14px; background: var(--warn-soft); color: var(--warn-text); border-radius: 8px; font-size: 13px; }
.svc-prose { max-width: 760px; margin: 0 auto; padding: var(--sp-12) 0 var(--sp-4); }

/* 服务页结构块 */
.svc-hero .hero-actions { margin-top: var(--sp-8); }
.svc-block .sec-head { margin-bottom: var(--sp-10); }
.module-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sp-6); counter-reset: mod; }
.module-card { position: relative; padding: 24px 24px 24px 66px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.module-no {
    position: absolute; left: 22px; top: 24px; width: 30px; height: 30px; border-radius: 9px;
    background: var(--c-primary-soft); color: var(--c-primary-dark);
    display: inline-flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 700;
}
.module-no::before { counter-increment: mod; content: counter(mod, decimal-leading-zero); }
.module-card h3 { font-size: 18px; font-weight: 700; line-height: 1.45; }
.module-card p { margin-top: 8px; font-size: 14.5px; line-height: 1.75; color: var(--t-3); }

/* 联系我们 */
.contact-wrap { padding: var(--sp-12) 0 var(--sp-16); }
.contact-grid { display: grid; grid-template-columns: 5fr 7fr; gap: var(--sp-10); align-items: start; }
.contact-list { display: flex; flex-direction: column; gap: var(--sp-5); }
.contact-list > li { display: flex; gap: 14px; align-items: flex-start; }
.contact-ico { flex-shrink: 0; width: 40px; height: 40px; border-radius: 10px; background: var(--c-primary-soft); color: var(--c-primary-dark); display: inline-flex; align-items: center; justify-content: center; }
.contact-ico svg { width: 20px; height: 20px; }
.contact-body { display: flex; flex-direction: column; gap: 2px; }
.contact-body em { font-style: normal; font-size: 12.5px; color: var(--t-4); }
.contact-body a, .contact-body span { font-size: 16px; font-weight: 600; color: var(--t-1); }
.contact-body a:hover { color: var(--c-primary); }
.contact-qr { width: 120px; height: 120px; border-radius: 10px; border: 1px solid var(--line); background: #fff; }
.contact-reassure { margin-top: var(--sp-8); padding-top: var(--sp-6); border-top: 1px solid var(--line); }
.contact-reassure h3 { font-size: 16px; font-weight: 700; margin-bottom: 14px; }
.contact-reassure .check-list { grid-template-columns: 1fr; gap: 10px; }
.contact-form-card { padding: 30px 28px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.contact-form-card > h2 { font-size: 22px; font-weight: 800; margin-bottom: var(--sp-6); }
.contact-prose { max-width: 760px; margin: var(--sp-12) auto 0; }

/* ---------- 20) 搜索 / 404 ---------- */
.search-form { display: flex; max-width: 560px; margin-top: var(--sp-5); }
.search-form input {
    flex: 1; min-width: 0; padding: 12px 16px; min-height: 48px; font-size: 15px; font-family: inherit;
    border: 1px solid var(--line); border-right: 0; border-radius: 10px 0 0 10px; background: #fff; color: var(--t-1);
}
.search-form input:focus { outline: none; border-color: var(--c-primary); }
.search-form button {
    padding: 0 26px; min-height: 48px; border: 0; border-radius: 0 10px 10px 0;
    background: var(--c-primary); color: #fff; font-size: 15px; font-weight: 600;
}
.search-form button:hover { background: var(--c-primary-dark); }

.error-page { text-align: center; padding: 90px 0 110px; }
.error-code { font-size: 96px; font-weight: 800; line-height: 1; letter-spacing: -.03em; background: var(--grad-brand); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent; }
.error-page h1 { margin-top: var(--sp-6); font-size: clamp(24px, 3.4vw, 30px); font-weight: 800; }
.error-desc { margin: var(--sp-4) auto 0; max-width: 520px; color: var(--t-3); }
.error-actions { justify-content: center; margin-top: var(--sp-8); }
.error-hint { margin-top: var(--sp-8); font-size: 14px; color: var(--t-4); }
.error-page .stack-tags { margin-top: var(--sp-4); }

/* Cookie 同意条 */
.consent-bar { position: fixed; left: 0; right: 0; bottom: 0; z-index: 950; background: #fff; border-top: 1px solid var(--line); box-shadow: 0 -6px 24px rgba(15, 23, 42, .08); }
.consent-inner { max-width: var(--container); margin: 0 auto; padding: 14px var(--sp-6); display: flex; flex-wrap: wrap; align-items: center; gap: var(--sp-4); }
.consent-text { flex: 1; min-width: 220px; font-size: 13.5px; color: var(--t-2); }
.consent-actions { display: flex; align-items: center; gap: 10px; }
.consent-btn { padding: 8px 16px; border: 1px solid var(--line); border-radius: 8px; background: #fff; color: var(--t-2); font-size: 13.5px; }
.consent-btn:hover { border-color: var(--c-primary); color: var(--c-primary); }
.consent-accept { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }
.consent-accept:hover { background: var(--c-primary-dark); color: #fff; }
.consent-more { font-size: 13.5px; }

/* ---------- 21) 动效 ---------- */
/* 首屏元素入场（纯 CSS，无 JS 依赖） */
.fx { animation: fx-up .8s cubic-bezier(.22, .61, .36, 1) both; }
.fx-1 { animation-delay: .05s; } .fx-2 { animation-delay: .14s; } .fx-3 { animation-delay: .24s; }
.fx-4 { animation-delay: .34s; } .fx-5 { animation-delay: .44s; }

/* 滚动显现：仅当 html.js 存在时才隐藏初始态（无 JS 内容默认可见） */
html.js [data-reveal] { opacity: 0; transform: translateY(22px); transition: opacity .7s cubic-bezier(.22, .61, .36, 1) var(--rd, 0ms), transform .7s cubic-bezier(.22, .61, .36, 1) var(--rd, 0ms); }
html.js [data-reveal].is-in { opacity: 1; transform: none; }

@keyframes fx-up { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: none; } }
@keyframes fx-faq { from { opacity: 0; } to { opacity: 1; } }
@keyframes fx-orb { 0%, 100% { transform: translate(0, 0); } 50% { transform: translate(26px, 30px); } }
@keyframes fx-shimmer { to { background-position: 200% center; } }
@keyframes fx-pulse { 0% { box-shadow: 0 0 0 0 rgba(74, 222, 128, .6); } 70% { box-shadow: 0 0 0 8px rgba(74, 222, 128, 0); } 100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); } }
@keyframes fx-arrow { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(4px); } }

/* ---------- 22) 响应式 ---------- */
/* LG 992–1199：抽屉导航切换点（≤1199） */
@media (max-width: 1199px) {
    :root { --sec-pad: var(--sp-20); }
    .nav-toggle { display: flex; }
    .nav {
        position: fixed; inset: 64px 0 auto; flex-direction: column; align-items: stretch;
        gap: 2px; padding: var(--sp-4) var(--sp-5) var(--sp-6); margin: 0;
        background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
        max-height: calc(100vh - 64px); overflow-y: auto;
        opacity: 0; visibility: hidden; transform: translateY(-8px);
        transition: opacity .2s ease, transform .2s ease, visibility .2s;
    }
    .nav.is-open { opacity: 1; visibility: visible; transform: translateY(0); }
    .nav-link { padding: 12px 8px; font-size: 15px; border-radius: 8px; }
    .nav-link::after { display: none; }
    .nav-drop { flex-direction: column; align-items: stretch; }
    .nav-sub { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: 0; padding: 0 0 6px 14px; background: none; }
    .nav-search { display: flex; margin-top: var(--sp-3); }
    .nav-search input { flex: 1; padding: 10px 12px; border: 1px solid var(--line); border-right: 0; border-radius: 9px 0 0 9px; font-size: 15px; min-height: 44px; }
    .nav-search button { width: 48px; border: 1px solid var(--line); border-left: 0; border-radius: 0 9px 9px 0; background: var(--c-primary); color: #fff; display: inline-flex; align-items: center; justify-content: center; }
    .nav-search button svg { width: 20px; height: 20px; }
    .navbar-cta { display: none; }
    .hero-inner { gap: var(--sp-10); }
    .svc-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .case-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* MD 768–991 */
@media (max-width: 991px) {
    :root { --sec-pad: var(--sp-16); }
    .container { padding: 0 20px; }
    .layout-list, .layout-detail { grid-template-columns: minmax(0, 1fr); gap: var(--sp-8); }
    .sidebar { position: static; }
    .hero-inner { grid-template-columns: minmax(0, 1fr); gap: var(--sp-10); padding: var(--sp-16) 0 var(--sp-12); }
    .hero-scroll { display: none; }
    .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .stat:nth-child(odd) { border-left: 0; }
    .stat:nth-child(n+3) { border-top: 1px solid var(--line); padding-top: var(--sp-5); margin-top: var(--sp-3); }
    .stat:nth-child(2) { border-left: 1px solid var(--line); }
    .stat:nth-child(4) { border-left: 1px solid var(--line); }
    .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .step::after { display: none; }
    .step { text-align: left; }
    .why-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .post-grid, .post-grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .foot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sp-8); }
    .contact-grid { grid-template-columns: minmax(0, 1fr); gap: var(--sp-10); }
}

/* SM <768 */
@media (max-width: 767px) {
    :root { --sec-pad: var(--sp-12); }
    .container { padding: 0 16px; }
    .hero-title { margin-top: var(--sp-5); }
    .svc-grid, .case-grid, .why-grid, .module-grid, .post-grid, .post-grid.cols-2 { grid-template-columns: minmax(0, 1fr); }
    .check-list { grid-template-columns: minmax(0, 1fr); }
    .steps { grid-template-columns: minmax(0, 1fr); gap: var(--sp-6); text-align: left; }
    .step { display: grid; grid-template-columns: 36px minmax(0, 1fr); column-gap: 14px; padding: 0 0 0 2px; }
    .step-no { grid-row: 1 / span 2; }
    .step-title { margin-top: 4px; }
    .foot-grid { grid-template-columns: minmax(0, 1fr); gap: var(--sp-8); }
    .foot-bottom { flex-direction: column; align-items: flex-start; }
    .float-service { right: 16px; bottom: 72px; }
    .to-top { right: 16px; bottom: 16px; }
    .error-code { font-size: 72px; }
    .logo-wall { gap: var(--sp-5) var(--sp-8); }
    .contact-form-card, .form-card { padding: 22px 18px; }
    .contact-grid { gap: var(--sp-8); }
    .page-hero { padding: 34px 0 30px; }
    .crumb { padding-bottom: var(--sp-4); }
    .hero-actions .btn { flex: 1 1 auto; }
    .sec-head { text-align: left; }
}

/* ---------- 23) 减弱动效：全量降级 ---------- */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    html.js [data-reveal] { opacity: 1 !important; transform: none !important; transition: none !important; }
    *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
    .fx { animation: none !important; }
    .hero-title em { animation: none !important; }
    .svc-card:hover, .case-card:hover, .post-card:hover { transform: none !important; }
    .link-arrow:hover svg { transform: none !important; }
    .svc-card:hover .svc-icon { transform: none !important; }
}